SIGMA VALVES product line of Quick Exhaust Valves (QEV) are available for Pneumatic and Hydraulic applications in a wide range of port sizes and port types, working pressures, flow range, and temperature compatibility. As with all Sigma products, the construction is all 316SS for durability and long-term dependability.

Sigma QEV are designed to provide fast closure of actuators or subsurface safety valves from remote mounted safety controls which decreases cost of installations, by allowing smaller tubing runs and fittings, while reducing the actuator closing time.